- y=log2(x−1)y=log2(x−1)y = {\log _2}\left( {x - 1} \right).
- y=log2(x2+1)y = {\log _2}\left( {{x^2} + 1} \right)
- y=log2(2x+1)y = {\log _2}\left( {{2^x} + 1} \right).
- y=(12)xy = {\left( {\dfrac{1}{2}} \right)^x}.